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Subject[GIT PULL] perf fixes
Linus,

Please pull the latest perf-urgent-for-linus git tree from:

git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git perf-urgent-for-linus

# HEAD: 4a31b424ac0656d1bb17520ee861144fe7a19664 perf/core: Fix memory leak triggered by perf --namespace

Misc fixes: two PMU driver fixes and a memory leak fix.

Thanks,

Ingo

------------------>
Andi Kleen (1):
perf/x86/intel: Hide TSX events when RTM is not supported

Kan Liang (1):
perf/x86/intel/uncore: Add event constraint for BDX PCU

Vasily Averin (1):
perf/core: Fix memory leak triggered by perf --namespace


arch/x86/events/intel/core.c | 35 +++++++++++++++++++++++------------
arch/x86/events/intel/uncore_snbep.c | 8 ++++++++
kernel/events/core.c | 1 +
3 files changed, 32 insertions(+), 12 deletions(-)

diff --git a/arch/x86/events/intel/core.c b/arch/x86/events/intel/core.c
index 9fb9a1f1e47b..f94855000d4e 100644
--- a/arch/x86/events/intel/core.c
+++ b/arch/x86/events/intel/core.c
@@ -3730,6 +3730,19 @@ EVENT_ATTR_STR(cycles-t, cycles_t, "event=0x3c,in_tx=1");
EVENT_ATTR_STR(cycles-ct, cycles_ct, "event=0x3c,in_tx=1,in_tx_cp=1");

static struct attribute *hsw_events_attrs[] = {
+ EVENT_PTR(mem_ld_hsw),
+ EVENT_PTR(mem_st_hsw),
+ EVENT_PTR(td_slots_issued),
+ EVENT_PTR(td_slots_retired),
+ EVENT_PTR(td_fetch_bubbles),
+ EVENT_PTR(td_total_slots),
+ EVENT_PTR(td_total_slots_scale),
+ EVENT_PTR(td_recovery_bubbles),
+ EVENT_PTR(td_recovery_bubbles_scale),
+ NULL
+};
+
+static struct attribute *hsw_tsx_events_attrs[] = {
EVENT_PTR(tx_start),
EVENT_PTR(tx_commit),
EVENT_PTR(tx_abort),
@@ -3742,18 +3755,16 @@ static struct attribute *hsw_events_attrs[] = {
EVENT_PTR(el_conflict),
EVENT_PTR(cycles_t),
EVENT_PTR(cycles_ct),
- EVENT_PTR(mem_ld_hsw),
- EVENT_PTR(mem_st_hsw),
- EVENT_PTR(td_slots_issued),
- EVENT_PTR(td_slots_retired),
- EVENT_PTR(td_fetch_bubbles),
- EVENT_PTR(td_total_slots),
- EVENT_PTR(td_total_slots_scale),
- EVENT_PTR(td_recovery_bubbles),
- EVENT_PTR(td_recovery_bubbles_scale),
NULL
};

+static __init struct attribute **get_hsw_events_attrs(void)
+{
+ return boot_cpu_has(X86_FEATURE_RTM) ?
+ merge_attr(hsw_events_attrs, hsw_tsx_events_attrs) :
+ hsw_events_attrs;
+}
+
static ssize_t freeze_on_smi_show(struct device *cdev,
struct device_attribute *attr,
char *buf)
@@ -4182,7 +4193,7 @@ __init int intel_pmu_init(void)

x86_pmu.hw_config = hsw_hw_config;
x86_pmu.get_event_constraints = hsw_get_event_constraints;
- x86_pmu.cpu_events = hsw_events_attrs;
+ x86_pmu.cpu_events = get_hsw_events_attrs();
x86_pmu.lbr_double_abort = true;
extra_attr = boot_cpu_has(X86_FEATURE_RTM) ?
hsw_format_attr : nhm_format_attr;
@@ -4221,7 +4232,7 @@ __init int intel_pmu_init(void)

x86_pmu.hw_config = hsw_hw_config;
x86_pmu.get_event_constraints = hsw_get_event_constraints;
- x86_pmu.cpu_events = hsw_events_attrs;
+ x86_pmu.cpu_events = get_hsw_events_attrs();
x86_pmu.limit_period = bdw_limit_period;
extra_attr = boot_cpu_has(X86_FEATURE_RTM) ?
hsw_format_attr : nhm_format_attr;
@@ -4279,7 +4290,7 @@ __init int intel_pmu_init(void)
extra_attr = boot_cpu_has(X86_FEATURE_RTM) ?
hsw_format_attr : nhm_format_attr;
extra_attr = merge_attr(extra_attr, skl_format_attr);
- x86_pmu.cpu_events = hsw_events_attrs;
+ x86_pmu.cpu_events = get_hsw_events_attrs();
intel_pmu_pebs_data_source_skl(
boot_cpu_data.x86_model == INTEL_FAM6_SKYLAKE_X);
pr_cont("Skylake events, ");
diff --git a/arch/x86/events/intel/uncore_snbep.c b/arch/x86/events/intel/uncore_snbep.c
index 95cb19f4e06f..f4e4168455a8 100644
--- a/arch/x86/events/intel/uncore_snbep.c
+++ b/arch/x86/events/intel/uncore_snbep.c
@@ -3035,11 +3035,19 @@ static struct intel_uncore_type *bdx_msr_uncores[] = {
NULL,
};

+/* Bit 7 'Use Occupancy' is not available for counter 0 on BDX */
+static struct event_constraint bdx_uncore_pcu_constraints[] = {
+ EVENT_CONSTRAINT(0x80, 0xe, 0x80),
+ EVENT_CONSTRAINT_END
+};
+
void bdx_uncore_cpu_init(void)
{
if (bdx_uncore_cbox.num_boxes > boot_cpu_data.x86_max_cores)
bdx_uncore_cbox.num_boxes = boot_cpu_data.x86_max_cores;
uncore_msr_uncores = bdx_msr_uncores;
+
+ hswep_uncore_pcu.constraints = bdx_uncore_pcu_constraints;
}

static struct intel_uncore_type bdx_uncore_ha = {
diff --git a/kernel/events/core.c b/kernel/events/core.c
index 10cdb9c26b5d..ab5ac84f82e2 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -6756,6 +6756,7 @@ static void perf_fill_ns_link_info(struct perf_ns_link_info *ns_link_info,
ns_inode = ns_path.dentry->d_inode;
ns_link_info->dev = new_encode_dev(ns_inode->i_sb->s_dev);
ns_link_info->ino = ns_inode->i_ino;
+ path_put(&ns_path);
}
}

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